Upping the ante on the issue of the Rafale fighter jet deal, Congress president Rahul Gandhi today asked Prime Minister Narendra Modi why an aircraft costing around Rs 520 crore was bought at Rs 1,600 crore. The Congress president also demanded a joint parliamentary committee (JPC) probe on the Rafale deal. Gandhi said a JPC probe is needed to know what is Narendra Modi and Anil Ambani's deal. Gandhi also attacked Finance Minister Arun Jaitley, saying he was blogging but not saying anything on a probe by a JPC.